The theme for this edition of the Defense Acquisition Research Journal is The Method Matters. The lead article is Survey of Modular Military Vehicles: Benefits and Burdens, by Jean M. Dasch and David J. Gorsich, which goes a long way to defining the often-misunderstood word modularity and provides a balanced look at the benefits and drawbacks of this acquisition methodology. Acquisition methodology is also at the heart of a classic article from the Summer 1995 issue of the Acquisition Review Quarterly, entitled Technology Approach: DoD Versus Boeing (A Comparative Study), by A. Lee Battershell. The author examines how the market-driven approach to development--where cost and schedule dominate decision making--contrasts with the militarys performance-driven approach and how each one can affect development time.Tapping Transaction Costs to Forecast Acquisition Cost Breaches, by Laura E. Armey and Diana I. Angelis, highlights an intriguing method to predict program cost overruns and breaches by focusing on transaction costs, as measured by proxy indicators of systems engineering and program management costs, as a leading indicator. Finally, Human Systems Engineering and Program Success-- A Retrospective Content Analysis, by Liana Algarn, describes the impact of early identification and assessment of human systems integration requirements on the development life-cycle costs and schedules of acquisition programs.